Vat dye.



UNITED ermine rerun-"T eunuch.

JOSEPH DEINET, F ELIBERFELI), GERMANY, ASSIGNOR TOEARBENFABRIKEN VGRM. FRIEDR. BAYER & (30., 0F ELBEREELD, GERMANY, A CORPORATION OF GERMANY.

VAT DYE.

No Drawing.

To all whom 'it my concern:

Be it known that I, JOSEPH DnINET, citizen of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in New Vat Dyestuffs, of which the following is a specification.

My invention relates to the production of a new anthracene derivative. It is obtained by convertin diaminoanthrarufin into its dibenzoylate derivative. The reaction is carried out by treating diaminoanthrarufin with benzoyl chlorid.

Example: parts of para-diaminoam thrarufin are heated to boiling for about half an hour with 100 parts of nitrobenzene and 40 parts of benzoyl chlorid. The new condensation product crystallizes from the cooling liquid in the shape of leaflets having a metallic luster which are filtered off and dried. It is soluble in pyridin with a violet. color, in concentrated sulfuric acid with a brown color, which turns bluish- Syecification of Letters Eatent. Patented Sept. 190%. Application filed Hay 15, 1909. Serial No. 496,113.

powder which is soluble in pyridin with a violet color; soluble in concentrated sulfuric acid with a brown color which turns bluishgreen; giving an orange-red vat with hydrosulfite and caustic soda lye, which vat dyes the textile fiber blue shades, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOSEPH DEINET. [L. a} Witnesses @rro Kfimo, C. J. WRIGHT. 

